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Two couples act on the beam. Determine the magnitude of F so that the resultant couple moment is 450 Ib ft, counterclockwise. Where on the beam does the resultant couple moment act? 200 lb 1.5 ft -2... If F = 125 lb, determine the resultant couple moment. 200 lb 1.5 ft 200 lb -2 ft- 1.25 ft 130 130 F The road exerts a torque of M A = 400 N m and M B = 200 N m on the brushes of the road sweeper. Determine the magnitude of the couple forces that are developed by the road on the rear wheels of the... Determine the magnitude of the forces F and - F, so that the resultant couple moment is 400 N m clockwise. 250 N 250 N 1 m -40% 600 N 600 N The man tries to open the valve by applying the couple of forces of F = 75 N to the wheel. Determine the couple of moment produced. F -150 mm-150 mm- F The bevel gear is subjected to the force F which is caused from contact with another gear. Determine the moment of this force about the y axis of the gear shaft. F = {20i + 8j - 15k} N 30 mm 40 mm X The board is used to hold the end of the cross lug wrench in the position shown when the man applies a force of F = 100 N. Determine the magnitude of the moment produced by this force about the... If the moment of the force F about the edge CA of the tetrahedron has a magnitude of M = 200 lb ft and is directed from C toward A, determine the magnitude of F. 8 ft 10 ft Sft a fon 6 ft N 4 ft A... The force of F = 80 lb acts along the edge DB of the tetrahedron. Determine the magnitude of the moment of this force about the edge CA. X 8 ft 5 ft 10 ft X611 6 ft 4 ft Z D 15 ft F B y Determine the moment produced by force F about the diagonal AF of the rectangular block. Express the result as a Cartesian vector. X C 3 m Z A 0 D F F = {-6i+ 3j + 10k} N B 1.5 m G 3 m The board is used to hold the end of the cross lug wrench in the position shown. If a torque of 30 N m about the x-axis is required to tighten the nut, determine the required magnitude of the force... Replace the distributed loading with an equivalent resultant force, and specify its location on the beam measured from point A. W 100 lb/ft 370 lb/ft w = (x + 3x + 100) lb/ft 15 ft- B -X Replace the loading on the beam by an equivalent resultant force and specify its location, measured from point A. + \FR = F ; (+MRA = ; Fn = 3 + 1.5 + 1.5 = 6 kN | 6(d) 3 (1) + 1.5 (1.5) + 1.5 (4) d... Determine the resultant moment of both the 100-lb force and the triangular distributed load about point O. y 12 ft- 20 lb/ft 100 lb 60 1 ft X Replace the loading system acting on the post by an equivalent resultant force and couple moment at point P. 60 lb 3 4 P O 30 lb 1 ft 3 ft 2 ft 40 lb X Replace the force and couple-moment system by an equivalent resultant force and specify its coordinate point of application (x, 0) on the x axis. F = 20 lb 3 ft 4 ft -5 ft F = 10 lb y M = 100 lb-ft O... Replace the force system acting on the pipe assembly by a resultant force and couple moment at point O. Express the results in Cartesian vector form. X 2 ft N F = {-20i-10j + 25k}lb O F = {-10i + 25j... Replace the force system acting on the truss by a resultant force and couple moment at point C. 6 ft 200 lb PC 150 lb -2 ft-2 ft2 ft- A O 100 lb -2 ft- B 5 500 lb Replace the loading acting on the frame by an equivalent resultant force and couple moment acting at point A. B -3 ft 80 lb. +3 -3 ft- 75 lb 60 lb + 3 ft -3 ft- 2 ft 1 40 lb A 4 ft Replace the force system by an equivalent resultant force and couple moment at point O. Set F = 15 lb. -2 in.- 6 in. 20 lb 40 30 1.5 in. X Replace the force system by an equivalent resultant force and couple moment at point O. Set F = 20 lb. y +2 in. 6 in. 20 lb 40 30 1.5 in. X 4 3 F Determine the magnitude and coordinate direction angles of the resultant couple moment. M = 40 lb-ft 20 15 X Z M = 30 lb-ft 130 y Two couples act on the frame. If d = 6 ft, determine the resultant couple moment by (a) Summing the moments of the two couples (b) Resolving each force into x and y components and then summing the... Two couples act on the frame. If d = 4 ft, determine the resultant couple moment by (a) Summing the moments of the two couples (b) Resolving each force into x and y components and then summing the... Two couples act on the frame. If the resultant couple moment is to be zero, determine the distance d between the 100-lb couple forces. 100 lb -3 ft-+d- 30 30% 100 Ib 150 Ib -3 ft- B T 4 ft 150 Ib Three couple moments act on the pipe assembly. Determine the magnitude of the resultant couple moment if M 2 = 50 N and M 3 = 35 N m. M3 0 120 120 120 (M M= 80 Nm If the valve can be opened with a couple moment of 25 N m within, determine the required magnitude of each couple forces that must be applied to the wheel. F -150 mm-150 mm. F The cord passing over the two small pegs A and B on the board is subjected to a tension of 10 lb. Determine the minimum tension P and the orientation of the cord passing over pegs C and D, so that... The crossbar wrench is used to remove a lug nut from the automobile wheel. The mechanic applies a couple to the wrench such that his hands are a constant distance apart. Is it necessary that a = b in... The A-frame is being hoisted into an upright position by the vertical force of F = 80 lb. Determine the moment of this force about the y' axis passing through points A and B when the frame is in the... The Rollerball skate is an in-line tandem skate that uses two large spherical wheels on each skate, rather than traditional wafer-shape wheels. During skating the two forces acting on the wheel of... The A-frame is being hoisted into an upright position by the vertical force of F = 80 lb. Determine the moment of this force about the x axis when the frame is in the position shown. x x N A 6 ft 30... The tool is used to shut off gas valves that are difficult to access. If the force F is applied to the handle, determine the component of the moment created about the z axis of the valve. z 0.25 m 30... Determine the moment of each force acting on the handle of the wrench about the axis. Take F 1 = {-2i + 4j - 8k} Ib, F 2 = {3i + 2j - 6k} lb. X F. F. B 45 3.5 in. 4 in. 6 in. Determine the resultant moment of the two forces about the Oa axis. Express the result as a Cartesian vector. F = 50 lb 5 ft 30 0 4 ft- B 30 45 120* 6 ft F = 80 lb 60 y Determine the moment of each force acting on the handle of the wrench about the z-axis. Take F 1 = {-2i + 4j - 8k} lb, F 2 = {3i + 2j - 6k} lb. F F B A - 45 3.5 in. Z 4 in. 6 in. The curved rod has a radius of 4 ft. If the cable AB exerts a force of 80 lb on the rod, determine the moment of this force about point C. Solve the problem by using two different position vectors. F... Determine the smallest force F that must be applied along the rope in order to develop a moment of M = 1500 N m at A. x 6 m B 45 4 m F C A 4m 6 m- y Determine the smallest force F that must be applied along the rope in order to cause the curved rod, which has a radius of 5 ft, to fail at the support C. This requires a moment of M = 80 Ib to be... Given the three nonzero vectors A, B, and C, show that if ,A (B X C) = 0 the three vectors must lie in the same plane. Determine the coordinate direction angles of the force F applied at the end of the pipe such that the moment of F about point A is zero. 1 ft -A -2 ft- 3 ft 45 B F If F = {550i + 60j + 30k} lb, determine the magnitude and coordinate direction angles of the moment of F about point A. 1 ft, z A -2 ft- 3 ft 45 B -y The force F = {400i - 100j - 700k} lb acts at the end of the beam. Determine the moment of this force about point O. 1.5 ft X B -0.25 ft F 8 ft In order to pull out the nail at B, the force F exerted on the handle of the hammer must produce a clockwise moment of 500 lbin. about point A. Determine the required magnitude of force F. 18 in. 30... The tower crane is used to hoist a 2-Mg load upward at constant velocity. The 1.5-Mg jib BD and 0.5-Mg jib BC have centers of mass at G 1 and G 2 , respectively. Determine the required mass of the... If the tension in the belt is 52 lb, determine the moment of each of these forces about the pin at A. 8 in. A 30 20 -5 in.- F = 52 lb 6 in. MAFU F = 52 lb Determine the orientation (0 < < 180) of the 40-lb force F so that it produces (a) The maximum moment about point A (b) No moment about point A. Find the moment in case (a). 8 ft- 2 ft The cable exerts a force of P = 6 kN at the end of the 8-m-long crane boom. If x = 10 m, determine the position of the boom so that this force creates a maximum moment about point O. What is this... Two forces act on the skew caster. Determine the resultant moment of these forces about point A and about point B. 1.25 in. 2.5 in. 60 80 lb B 10 lb 2 in. Determine the angle at which the 500-N force must act at A so that the moment of this force about point B is equal to zero. Im B 2 m- 10.3 E 500 N Determine the shear force and moment acting at point D of the beam. - 6 ft- 9 ft D 2 kip/ft 9 ft- B The beam-column is fixed to the floor and supports the load shown. Determine the normal force, shear force, and moment at points A and B. 5 kN 0.6 m 0.2 m 2m A B 0.8 kN. m 2.5 kN 0.4 m The structural connections transmit the loads shown to the column. Determine the normal force, shear force, and moment acting in the column at a section passing horizontally through point A. 30 mm 16... Determine the normal force, shear force, and moment in the shaft at points B and D. These points lie just to the right of the 150-lb force and the bearing at C, respectively. There is a thrust... Determine the moments of inertia for the shaded area with respect to the u and v axes. v y 0.5 in. 5 in. 1 in. 30 4 in.- u -0.5 in. 10.5 in. X Determine the moment of inertia for the beams crosssectional area about the x axis that passes through the centroid C of the cross section. N 0] 25 mm 200 mm, 45 45 25 mm 100 mm 100 mm C 200 mm 45% 45 Determine which locates the centroid C of the crosssectional area of the wing channel, and then determine the moment of inertia I x about the centroidal x axis. Neglect the effect of rounded... Determine the moment of inertia of the beams crosssectional area about the y axis. 30 mm 140 mm 30 mm 30 mm K 70 mm 30 mm 170 mm -x X Determine the moment of inertia of the beams crosssectional area about the x axis. 30 mm 140 mm 30 mm y Js 30 mm 70 mm 30 mm 170 mm X Determine the moment of inertia of the beams crosssectional area about the x axis. 200 mm y X. 14 100 mm C 300 mm 50 mm 50 mm -X Determine the moment of inertia of the area about the x axis. T 3 in. 6 in. y 6 in. 6 in.- X Determine the moment of inertia of the beams cross-sectional area about the x-axis. 6 in. y 2 in. y' 4 in.. C 1 in. 1 in. 1 in. 1 in. X Determine the moment of inertia of the equilateral triangle about the x axis passing through its centroid. y C a - y = 3 (z - x) a Determine the moment of inertia for the area about the y axis. y y = = h 6343 -b h X Determine the magnitude of the force P and the orientation of the 200-lb force required to keep the particle in equilibrium. (-1 ft, -7 ft, 4 ft) F3= 200 lb X N F=360 lb F= 120 lb 20 F = 300 lb P y Determine the friction developed between the 50-kg crate and the ground if (a) P = 200 N, and (b) P = 400 N. The coefficients of static and kinetic friction between the crate and the ground are s =... Determine the components of reaction acting at the balland- socket A, roller B, and cord CD. X B 400 N 2 m 2 m Z D 300 N 1m 2 m C y Locate the centroid x of the area. y y = a h a-x +h h X Locate the centroid x of the area. 16 ft -y=(4-x) -4 ft- T 4 ft X Locate the centroid (x, y) of the exparabolic segment of area. b 4 y X Determine the magnitude of the hydrostatic force acting on gate AB, which has a width of 4 ft. The specific weight of water is = 62.4 lb/ft. -3 ft- 4 ft Locate the centroid of the area. a y -L- -y = a sin x L X Locate the centroid x of the area. y 4 m y = 4 - 1x -8 m- X Locate the centroid y of the area. y 4 m 1 x = 4 = 1/6 x -8 m- Locate the centroid y of the area. y y = -b- h -X Locate the centroid y of the area. 4 m 4 m -X Locate the centroid x of the area. 4m (y=4x -4m Locate the centroid y of the area. 1 1 m y = 1-1/x (Y=1 -2 m- X Locate the centroid (x, y, z) of the wire bent in the shape shown. 300 mm 600 mm z 400 mm Locate the centroid x of the shaded area. y a q xn h X Locate the centroid y of the homogeneous solid formed by revolving the shaded area about the y axis. -1 m- -2= y 0.5 m -y Locate the center of mass x of the straight rod if its mass per unit length is given by m = 0.5 (1+x) kg. -1 m X Determine the centroid (x,y) of the area. 1m y = r 1 m X Determine the centroid (x,y) of the area. 1m -y=x -1m- -X Determine the centroid y of the area. IN 2 m -1 m- -y = 2x -1 m- X A cone is attached to the hemisphere. If both pieces have the same density, determine the height h of the cone if the configuration is to be in neutral equilibrium. 3 ft h The door has a uniform weight of 50 lb. It is hinged at A and is held open by the 30-lb weight and the pulley. Determine the angle for equilibrium. A k = 200 N/m wwwww 0 40 Nm 0.5 m Consider a particle in the potential shown in Figure 7.3. (a) Find the first-order correction to the ground-state wave function. The first three nonzero terms in the sum will suffice. (b) Using the... Determine the magnitude of force P required to hold the 50-kg smooth rod in equilibrium at = 60. B 5 m 0 Prob. F11-2 A P Determine the moment of inertia of the area about the y axis. y = 2 cos(x) -4 in.- y -4 in.- 2 in. X Determine the moment of inertia for the area about the x axis y y = 4x- - 4 in. 4 in. --x Determine the moment of inertia of the area about the y axis. 80 mm y 20 mm -y =(400-x) X Locate the centroid of the area. Solve the problem by evaluating the integrals using Simpsons rule. y y = 0.5ex 1 m -X The load can be supported by two boys when the cord is suspended over the pipe (a half-turn). If each boy can pull with a force of 125 lb, determine the maximum weight of the load. Can one boy... The hand clamp is constructed using a square-threaded screw having a mean diameter of 36 mm, a lead of 4 mm, and a coefficient of static friction at the screw of s = 0.3. To tighten the screw, a... Determine the moment of inertia I x of the area about the x axis. y 150 mm 150 mm O -100 mm-100 mm-150 mm - 75 mm X Draw the free-body diagram for the following problems. a) The rod in Prob. 525. b) The bar in Prob. 527. c) The disk in Prob. 528. 3 -3 ft- 4 100 lb + -3 ft- B 200 lb-ft 2 ft 13 12 Draw the free-body diagram for the following problems. a) The clamp in Prob. 532. b) The jib crane in Prob. 533. c) The crane in Prob. 535. d) The beam in Prob. 536. -150 mm- B 250 mm (a) The potential takes the constant value 0 on the closed surface S which bounds the volume V. (b) The total charge inside V is Q. There is no charge anywhere else. Show that the electrostatic... Let the space between two concentric spheres with radii a and R a be filled uniformly with charge. (a) Calculate the total energy U E in terms of the total charge Q and the variable x = a/R. Check...
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